<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-02 -061 19:30:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.03.02 (061) 19:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202606103021930009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="13.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.654" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="34.497" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="7.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.850" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="1.960" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="95.002" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="12.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.567" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="7.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="356.446" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="272.016" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.679" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="119.537" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="56.476" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="61.809" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="136.460" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.440" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="110">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65 12.7 12.75 12.8 12.85 12.9 12.95 13.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 340.000 341.667 343.333 345.000 345.000 346.250 347.500 348.750 350.000 351.667 353.333 355.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 365.000 366.000 367.000 368.000 369.000 370.000 370.000 375.000 372.500 370.000 375.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 386.250 387.500 388.750 390.000 390.000 390.000 390.000 390.000 392.500 395.000 397.500 400.000 400.000 400.000 405.000 405.000 405.000 405.000 405.000 405.000 410.000 410.000 405.000 410.000 415.000 420.000 425.000 425.000 425.000 425.000 427.500 430.000 435.000 435.000 440.000 440.000 442.500 445.000 447.500 450.000 455.000 460.000 460.000 465.000 465.000 465.000 470.000 475.000 480.000 480.000 490.000 490.000 495.000 505.000 510.000 515.000 525.000 533.333 541.667 553.236 566.695
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 66 48 0 60 66 48 54 0 66 45 48 60 0 0 69 69 69 66 72 72 60 0 66 69 69 0 0 0 0 69 69 63 0 66 63 0 60 0 57 60 63 0 0 60 66 66 66 66 0 0 0 66 69 69 66 60 0 0 0 57 63 66 51 0 60 0 60 63 60 60 0 0 57 0 42 48 0 57 0 54 45 54 48 54 0 57 0 60 54 48 57 54 60 51 57 57 57 57 54 51 51 51 48 48 51 45 0 42 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="3">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.85 1.9 1.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
95.002 95.750 96.556
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.772 90.0 95.0 100.0 105.0 110.0 115.0 115.251 120.0 120.502 125.0 125.753 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 356.446 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.22 1.313 1.697 1.897 1.96 1.874 1.865 1.865 1.865 1.946 1.96 2.094 2.266 2.454 2.658 2.874 3.102 3.339 3.583 3.831 4.083 4.337 4.593 4.85 5.108 5.367 5.626 5.886 6.146 6.408 6.67 6.933 7.197 7.462 7.728 7.996 8.265 8.536 8.808 9.082 9.357 9.633 9.91 10.188 10.466 10.744 11.02 11.294 11.563 11.824 12.074 12.309 12.523 12.707 12.853 12.952 12.998 13.0 12.996 12.976 12.942 12.893 12.831 12.756 12.669 12.572 12.464 12.347 12.222 12.089 11.949 11.803 11.651 11.494 11.333 11.168 10.999 10.828 10.654 10.478 10.301 10.123 9.944 9.764 9.585 9.405 9.226 9.048 8.871 8.695 8.52 8.346 8.174 8.004 7.836 7.67 7.506 7.344 7.185 7.028 6.873 6.72 6.57 6.423 6.278 6.135 5.995 5.858 5.723 5.591 5.461 5.334 5.209 5.087 4.967 4.85 4.735 4.623 4.513 4.406 4.3 4.197 4.096 3.998 3.902 3.807 3.715 3.625 3.537 3.452 3.368 3.286 3.205 3.127 3.051 2.976 2.903 2.832 2.763 2.695 2.629 2.564 2.501 2.439 2.379 2.32 2.263 2.207 2.153 2.1 2.048 1.997 1.947 1.899 1.852 1.806 1.762 1.718 1.675 1.634 1.593 1.554 1.515 1.477 1.441 1.405 1.37 1.336 1.303 1.27 1.239 1.208 1.178 1.148 1.12 1.092 1.065 1.038 1.012 0.987 0.963 0.939 0.915 0.892 0.87 0.848 0.827

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.96" PeakHeight="110.0" Num="3" Error="0.0">
-29.006 11.033 -2.255
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.96" EndFrequency="13.0" PeakHeight="356.446" Num="5" zHalfNm="272.016" Error="1.817">
-209.506 -35.996 21.003 -6.728 0.534
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="15.753" Depth="0.095"/>
<TopsideChapman PeakHeight="356.446" PeakDensity="2096774.2" PeakScaleHeight="61.809" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
